NO. 3587 OSTRACODS — HOBBS 9 



matic loop; penis L-shaped, with bulbous area in horizontal plane 

 and distinctly longer than slender vertical portion. Finger guard 

 simple Avith distinct groove extending from base to distal end along 

 posterior surface. Dorsal finger comparatively slender with bifid tip; 

 ventral finger gently ciu"ved but wdth long, nearly straight portion just 

 proximal to bulbous area. Clasping apparatus L-shaped with sub- 

 angular hump at posterior junction of two rami; external borders of 

 both rami and internal border of vertical ramus entire. Internal 

 border of horizontal ramus with comparatively long conical tooth near 

 midlength and three low, but pointed, teeth along distal half; apex 

 of ramus with two teeth. 



Female. — Eye present. Shell (fig. If) subreniform with proximal 

 emargination ventrally; submarginal setae present except dorsally 

 between levels of eye and amiculum, nowhere conspicuously abundant. 

 Amiculum and J -shaped rod present; amiculum, although partially 

 obscured by adhering debris, fully ruffled and extending beyond 

 posterodorsal margin of shell; length 0.46 mm, height 0.28 mm. 



Type-locality and range. — Known only from a small stream 

 immediately east of Maxwelton, Greenbrier County, West Virginia. 



Disposition of types. — The unique holotypic male and allotypic 

 female are deposited in the United States National Museum, 113477 

 and 113478, respectively. 



Host. — Cambarus b. bartonii (Fabricius) was the only crayfish 

 present in the collection from which the type specimens were removed. 



OSTRACOD associates. NoUC. 



Relationships. — Dadylocythere phoxa is most closely related to 

 D. daphniodes and D. runki but differs from both in possessing a short 

 vertical ramus of the clasping apparatus, and the proximal tooth on 

 the internal border of the horizontal ramus is conical rather than saw- 

 toothed. The narrow, almost ventrally directed peniferal groove is 

 not found in any other member of the genus. 



Name. — From the Greek "phoxas," meaning pointed, so named 

 because of the prominent pointed proximal tooth on the internal 

 border of the horizontal ramus of the clasping apparatus. 



